Create stats buffer in logd.

Bug: 69323063
Test: ran unit tests.
Change-Id: Icfb827ab4674172c26b4bbfe1a9b3bffc03dc24b
(cherry picked from commit 1b1b6f50c78d88e3256a5e13559d92fbb6d1c8fe)

5 files changed, 24 insertions, 5 deletions

diff --git a/liblog/include/log/log.h b/liblog/include/log/log.h
index d01708d8b..3813e6e32 100644
--- a/liblog/include/log/log.h
+++ b/liblog/include/log/log.h
@@ -95,6 +95,8 @@ int __android_log_btwrite(int32_t tag, char type, const void* payload,
                           size_t len);
 int __android_log_bswrite(int32_t tag, const char* payload);
 
+int __android_log_stats_bwrite(int32_t tag, const void* payload, size_t len);
+
 #define android_bWriteLog(tag, payload, len) \
   __android_log_bwrite(tag, payload, len)
 #define android_btWriteLog(tag, type, payload, len) \
diff --git a/liblog/include/log/log_id.h b/liblog/include/log/log_id.h
index 7bfa2770b..c44f5a2eb 100644
--- a/liblog/include/log/log_id.h
+++ b/liblog/include/log/log_id.h
@@ -31,8 +31,9 @@ typedef enum log_id {
   LOG_ID_EVENTS = 2,
   LOG_ID_SYSTEM = 3,
   LOG_ID_CRASH = 4,
-  LOG_ID_SECURITY = 5,
-  LOG_ID_KERNEL = 6, /* place last, third-parties can not use it */
+  LOG_ID_STATS = 5,
+  LOG_ID_SECURITY = 6,
+  LOG_ID_KERNEL = 7, /* place last, third-parties can not use it */
 
   LOG_ID_MAX
 } log_id_t;
diff --git a/liblog/log_event_list.c b/liblog/log_event_list.c
index 59ea5ef13..a59cb8738 100644
--- a/liblog/log_event_list.c
+++ b/liblog/log_event_list.c
@@ -301,7 +301,7 @@ LIBLOG_ABI_PUBLIC int android_log_write_list(android_log_context ctx,
   const char* msg;
   ssize_t len;
 
-  if ((id != LOG_ID_EVENTS) && (id != LOG_ID_SECURITY)) {
+  if ((id != LOG_ID_EVENTS) && (id != LOG_ID_SECURITY) && (id != LOG_ID_STATS)) {
     return -EINVAL;
   }
 
@@ -326,7 +326,9 @@ LIBLOG_ABI_PUBLIC int android_log_write_list(android_log_context ctx,
   }
   return (id == LOG_ID_EVENTS)
              ? __android_log_bwrite(context->tag, msg, len)
-             : __android_log_security_bwrite(context->tag, msg, len);
+             : ((id == LOG_ID_STATS)
+                    ? __android_log_stats_bwrite(context->tag, msg, len)
+                    : __android_log_security_bwrite(context->tag, msg, len));
 }
 
 LIBLOG_ABI_PRIVATE int android_log_write_list_buffer(android_log_context ctx,
diff --git a/liblog/logger_name.c b/liblog/logger_name.c
index a5a83e05a..479bbfeec 100644
--- a/liblog/logger_name.c
+++ b/liblog/logger_name.c
@@ -22,12 +22,13 @@
 
 /* In the future, we would like to make this list extensible */
 static const char* LOG_NAME[LOG_ID_MAX] = {
-  /* clang-format off */
+      /* clang-format off */
   [LOG_ID_MAIN] = "main",
   [LOG_ID_RADIO] = "radio",
   [LOG_ID_EVENTS] = "events",
   [LOG_ID_SYSTEM] = "system",
   [LOG_ID_CRASH] = "crash",
+  [LOG_ID_STATS] = "stats",
   [LOG_ID_SECURITY] = "security",
   [LOG_ID_KERNEL] = "kernel",
   /* clang-format on */
diff --git a/liblog/logger_write.c b/liblog/logger_write.c
index 84feb206b..589ce8429 100644
--- a/liblog/logger_write.c
+++ b/liblog/logger_write.c
@@ -546,6 +546,19 @@ LIBLOG_ABI_PUBLIC int __android_log_bwrite(int32_t tag, const void* payload,
   return write_to_log(LOG_ID_EVENTS, vec, 2);
 }
 
+LIBLOG_ABI_PUBLIC int __android_log_stats_bwrite(int32_t tag,
+                                                 const void* payload,
+                                                 size_t len) {
+  struct iovec vec[2];
+
+  vec[0].iov_base = &tag;
+  vec[0].iov_len = sizeof(tag);
+  vec[1].iov_base = (void*)payload;
+  vec[1].iov_len = len;
+
+  return write_to_log(LOG_ID_STATS, vec, 2);
+}
+
 LIBLOG_ABI_PUBLIC int __android_log_security_bwrite(int32_t tag,
                                                     const void* payload,
                                                     size_t len) {